From dc0093cb512acdc7ecbb939703cb1563250c8f39 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Sat, 21 Jan 2023 17:40:59 +0530
Subject: [PATCH] SHM FS: Return a not supported error if SHM_DIR does not
 exist

---
 tools/utils/shm/shm_fs.go | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/tools/utils/shm/shm_fs.go b/tools/utils/shm/shm_fs.go
index b895f7d7c..326f62370 100644
--- a/tools/utils/shm/shm_fs.go
+++ b/tools/utils/shm/shm_fs.go
@@ -103,6 +103,9 @@ func create_temp(pattern string, size uint64) (ans MMap, err error) {
 				}
 				continue
 			}
+			if errors.Is(err, fs.ErrNotExist) {
+				return nil, &ErrNotSupported{err: err}
+			}
 			return
 		}
 		break
@@ -113,6 +116,9 @@ func create_temp(pattern string, size uint64) (ans MMap, err error) {
 func Open(name string, size uint64) (MMap, error) {
 	ans, err := os.OpenFile(file_path_from_name(name), os.O_RDONLY, 0)
 	if err != nil {
+		if errors.Is(err, fs.ErrNotExist) {
+			return nil, &ErrNotSupported{err: err}
+		}
 		return nil, err
 	}
 	return file_mmap(ans, size, READ, false, name)